2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2004
6 Copyright (C) Volker Lendecke 2005
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "system/filesys.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "../librpc/gen_ndr/open_files.h"
35 extern const struct generic_mapping file_generic_mapping;
37 struct deferred_open_record {
38 bool delayed_for_oplocks;
43 /****************************************************************************
44 If the requester wanted DELETE_ACCESS and was rejected because
45 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
47 ****************************************************************************/
49 static bool parent_override_delete(connection_struct *conn,
50 const struct smb_filename *smb_fname,
52 uint32_t rejected_mask)
54 if ((access_mask & DELETE_ACCESS) &&
55 (rejected_mask & DELETE_ACCESS) &&
56 can_delete_file_in_directory(conn, smb_fname)) {
62 /****************************************************************************
63 Check if we have open rights.
64 ****************************************************************************/
66 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
67 const struct smb_filename *smb_fname,
71 /* Check if we have rights to open. */
73 struct security_descriptor *sd = NULL;
74 uint32_t rejected_share_access;
75 uint32_t rejected_mask = access_mask;
77 rejected_share_access = access_mask & ~(conn->share_access);
79 if (rejected_share_access) {
80 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
82 (unsigned int)access_mask,
83 smb_fname_str_dbg(smb_fname),
84 (unsigned int)rejected_share_access ));
85 return NT_STATUS_ACCESS_DENIED;
88 if (!use_privs && get_current_uid(conn) == (uid_t)0) {
89 /* I'm sorry sir, I didn't know you were root... */
90 DEBUG(10,("smbd_check_access_rights: root override "
91 "on %s. Granting 0x%x\n",
92 smb_fname_str_dbg(smb_fname),
93 (unsigned int)access_mask ));
97 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
98 DEBUG(10,("smbd_check_access_rights: not checking ACL "
99 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
100 smb_fname_str_dbg(smb_fname),
101 (unsigned int)access_mask ));
105 if (access_mask == DELETE_ACCESS &&
106 VALID_STAT(smb_fname->st) &&
107 S_ISLNK(smb_fname->st.st_ex_mode)) {
108 /* We can always delete a symlink. */
109 DEBUG(10,("smbd_check_access_rights: not checking ACL "
110 "on DELETE_ACCESS on symlink %s.\n",
111 smb_fname_str_dbg(smb_fname) ));
115 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
120 if (!NT_STATUS_IS_OK(status)) {
121 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
123 smb_fname_str_dbg(smb_fname),
126 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
134 * Never test FILE_READ_ATTRIBUTES. se_file_access_check() also takes care of
135 * owner WRITE_DAC and READ_CONTROL.
137 status = se_file_access_check(sd,
138 get_current_nttok(conn),
140 (access_mask & ~FILE_READ_ATTRIBUTES),
143 DEBUG(10,("smbd_check_access_rights: file %s requesting "
144 "0x%x returning 0x%x (%s)\n",
145 smb_fname_str_dbg(smb_fname),
146 (unsigned int)access_mask,
147 (unsigned int)rejected_mask,
148 nt_errstr(status) ));
150 if (!NT_STATUS_IS_OK(status)) {
151 if (DEBUGLEVEL >= 10) {
152 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
153 smb_fname_str_dbg(smb_fname) ));
154 NDR_PRINT_DEBUG(security_descriptor, sd);
160 if (NT_STATUS_IS_OK(status) ||
161 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
165 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
169 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
170 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
171 !lp_store_dos_attributes(SNUM(conn)) &&
172 (lp_map_readonly(SNUM(conn)) ||
173 lp_map_archive(SNUM(conn)) ||
174 lp_map_hidden(SNUM(conn)) ||
175 lp_map_system(SNUM(conn)))) {
176 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
178 DEBUG(10,("smbd_check_access_rights: "
180 "FILE_WRITE_ATTRIBUTES "
182 smb_fname_str_dbg(smb_fname)));
185 if (parent_override_delete(conn,
189 /* Were we trying to do an open
190 * for delete and didn't get DELETE
191 * access (only) ? Check if the
192 * directory allows DELETE_CHILD.
194 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
197 rejected_mask &= ~DELETE_ACCESS;
199 DEBUG(10,("smbd_check_access_rights: "
203 smb_fname_str_dbg(smb_fname)));
206 if (rejected_mask != 0) {
207 return NT_STATUS_ACCESS_DENIED;
212 static NTSTATUS check_parent_access(struct connection_struct *conn,
213 struct smb_filename *smb_fname,
214 uint32_t access_mask)
217 char *parent_dir = NULL;
218 struct security_descriptor *parent_sd = NULL;
219 uint32_t access_granted = 0;
221 if (!parent_dirname(talloc_tos(),
222 smb_fname->base_name,
225 return NT_STATUS_NO_MEMORY;
228 if (get_current_uid(conn) == (uid_t)0) {
229 /* I'm sorry sir, I didn't know you were root... */
230 DEBUG(10,("check_parent_access: root override "
231 "on %s. Granting 0x%x\n",
232 smb_fname_str_dbg(smb_fname),
233 (unsigned int)access_mask ));
237 status = SMB_VFS_GET_NT_ACL(conn,
242 if (!NT_STATUS_IS_OK(status)) {
243 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
244 "%s with error %s\n",
251 * Never test FILE_READ_ATTRIBUTES. se_file_access_check() also takes care of
252 * owner WRITE_DAC and READ_CONTROL.
254 status = se_file_access_check(parent_sd,
255 get_current_nttok(conn),
257 (access_mask & ~FILE_READ_ATTRIBUTES),
259 if(!NT_STATUS_IS_OK(status)) {
260 DEBUG(5,("check_parent_access: access check "
261 "on directory %s for "
262 "path %s for mask 0x%x returned (0x%x) %s\n",
264 smb_fname->base_name,
267 nt_errstr(status) ));
274 /****************************************************************************
275 fd support routines - attempt to do a dos_open.
276 ****************************************************************************/
278 NTSTATUS fd_open(struct connection_struct *conn,
283 struct smb_filename *smb_fname = fsp->fsp_name;
284 NTSTATUS status = NT_STATUS_OK;
288 * Never follow symlinks on a POSIX client. The
289 * client should be doing this.
292 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
297 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
298 if (fsp->fh->fd == -1) {
299 int posix_errno = errno;
301 #if defined(ENOTSUP) && defined(OSF1)
302 /* handle special Tru64 errno */
303 if (errno == ENOTSUP) {
308 /* fix broken NetBSD errno */
309 if (errno == EFTYPE) {
313 /* fix broken FreeBSD errno */
314 if (errno == EMLINK) {
317 #endif /* O_NOFOLLOW */
318 status = map_nt_error_from_unix(posix_errno);
319 if (errno == EMFILE) {
320 static time_t last_warned = 0L;
322 if (time((time_t *) NULL) > last_warned) {
323 DEBUG(0,("Too many open files, unable "
324 "to open more! smbd's max "
326 lp_max_open_files()));
327 last_warned = time((time_t *) NULL);
333 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
334 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
335 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
340 /****************************************************************************
341 Close the file associated with a fsp.
342 ****************************************************************************/
344 NTSTATUS fd_close(files_struct *fsp)
351 if (fsp->fh->fd == -1) {
352 return NT_STATUS_OK; /* What we used to call a stat open. */
354 if (fsp->fh->ref_count > 1) {
355 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
358 ret = SMB_VFS_CLOSE(fsp);
361 return map_nt_error_from_unix(errno);
366 /****************************************************************************
367 Change the ownership of a file to that of the parent directory.
368 Do this by fd if possible.
369 ****************************************************************************/
371 void change_file_owner_to_parent(connection_struct *conn,
372 const char *inherit_from_dir,
375 struct smb_filename *smb_fname_parent = NULL;
379 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
380 NULL, NULL, &smb_fname_parent);
381 if (!NT_STATUS_IS_OK(status)) {
385 ret = SMB_VFS_STAT(conn, smb_fname_parent);
387 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
388 "directory %s. Error was %s\n",
389 smb_fname_str_dbg(smb_fname_parent),
391 TALLOC_FREE(smb_fname_parent);
395 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
396 /* Already this uid - no need to change. */
397 DEBUG(10,("change_file_owner_to_parent: file %s "
398 "is already owned by uid %d\n",
400 (int)fsp->fsp_name->st.st_ex_uid ));
401 TALLOC_FREE(smb_fname_parent);
406 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
409 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
410 "file %s to parent directory uid %u. Error "
411 "was %s\n", fsp_str_dbg(fsp),
412 (unsigned int)smb_fname_parent->st.st_ex_uid,
415 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
416 "parent directory uid %u.\n", fsp_str_dbg(fsp),
417 (unsigned int)smb_fname_parent->st.st_ex_uid));
418 /* Ensure the uid entry is updated. */
419 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
422 TALLOC_FREE(smb_fname_parent);
425 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
426 const char *inherit_from_dir,
428 SMB_STRUCT_STAT *psbuf)
430 struct smb_filename *smb_fname_parent = NULL;
431 struct smb_filename *smb_fname_cwd = NULL;
432 char *saved_dir = NULL;
433 TALLOC_CTX *ctx = talloc_tos();
434 NTSTATUS status = NT_STATUS_OK;
437 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
439 if (!NT_STATUS_IS_OK(status)) {
443 ret = SMB_VFS_STAT(conn, smb_fname_parent);
445 status = map_nt_error_from_unix(errno);
446 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
447 "directory %s. Error was %s\n",
448 smb_fname_str_dbg(smb_fname_parent),
453 /* We've already done an lstat into psbuf, and we know it's a
454 directory. If we can cd into the directory and the dev/ino
455 are the same then we can safely chown without races as
456 we're locking the directory in place by being in it. This
457 should work on any UNIX (thanks tridge :-). JRA.
460 saved_dir = vfs_GetWd(ctx,conn);
462 status = map_nt_error_from_unix(errno);
463 DEBUG(0,("change_dir_owner_to_parent: failed to get "
464 "current working directory. Error was %s\n",
469 /* Chdir into the new path. */
470 if (vfs_ChDir(conn, fname) == -1) {
471 status = map_nt_error_from_unix(errno);
472 DEBUG(0,("change_dir_owner_to_parent: failed to change "
473 "current working directory to %s. Error "
474 "was %s\n", fname, strerror(errno) ));
478 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
480 if (!NT_STATUS_IS_OK(status)) {
484 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
486 status = map_nt_error_from_unix(errno);
487 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
488 "directory '.' (%s) Error was %s\n",
489 fname, strerror(errno)));
493 /* Ensure we're pointing at the same place. */
494 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
495 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
496 DEBUG(0,("change_dir_owner_to_parent: "
497 "device/inode on directory %s changed. "
498 "Refusing to chown !\n", fname ));
499 status = NT_STATUS_ACCESS_DENIED;
503 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
504 /* Already this uid - no need to change. */
505 DEBUG(10,("change_dir_owner_to_parent: directory %s "
506 "is already owned by uid %d\n",
508 (int)smb_fname_cwd->st.st_ex_uid ));
509 status = NT_STATUS_OK;
514 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
518 status = map_nt_error_from_unix(errno);
519 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
520 "directory %s to parent directory uid %u. "
521 "Error was %s\n", fname,
522 (unsigned int)smb_fname_parent->st.st_ex_uid,
525 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
526 "directory %s to parent directory uid %u.\n",
527 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
528 /* Ensure the uid entry is updated. */
529 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
533 vfs_ChDir(conn,saved_dir);
535 TALLOC_FREE(smb_fname_parent);
536 TALLOC_FREE(smb_fname_cwd);
540 /****************************************************************************
541 Open a file - returning a guaranteed ATOMIC indication of if the
542 file was created or not.
543 ****************************************************************************/
545 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
551 NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
552 bool file_existed = VALID_STAT(fsp->fsp_name->st);
554 *file_created = false;
556 if (!(flags & O_CREAT)) {
558 * We're not creating the file, just pass through.
560 return fd_open(conn, fsp, flags, mode);
563 if (flags & O_EXCL) {
565 * Fail if already exists, just pass through.
567 status = fd_open(conn, fsp, flags, mode);
570 * Here we've opened with O_CREAT|O_EXCL. If that went
571 * NT_STATUS_OK, we *know* we created this file.
573 *file_created = NT_STATUS_IS_OK(status);
579 * Now it gets tricky. We have O_CREAT, but not O_EXCL.
580 * To know absolutely if we created the file or not,
581 * we can never call O_CREAT without O_EXCL. So if
582 * we think the file existed, try without O_CREAT|O_EXCL.
583 * If we think the file didn't exist, try with
584 * O_CREAT|O_EXCL. Keep bouncing between these two
585 * requests until either the file is created, or
586 * opened. Either way, we keep going until we get
587 * a returnable result (error, or open/create).
591 int curr_flags = flags;
594 /* Just try open, do not create. */
595 curr_flags &= ~(O_CREAT);
596 status = fd_open(conn, fsp, curr_flags, mode);
597 if (NT_STATUS_EQUAL(status,
598 NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
600 * Someone deleted it in the meantime.
603 file_existed = false;
604 DEBUG(10,("fd_open_atomic: file %s existed. "
606 smb_fname_str_dbg(fsp->fsp_name)));
610 /* Try create exclusively, fail if it exists. */
611 curr_flags |= O_EXCL;
612 status = fd_open(conn, fsp, curr_flags, mode);
613 if (NT_STATUS_EQUAL(status,
614 NT_STATUS_OBJECT_NAME_COLLISION)) {
616 * Someone created it in the meantime.
617 * Retry without O_CREAT.
620 DEBUG(10,("fd_open_atomic: file %s "
621 "did not exist. Retry.\n",
622 smb_fname_str_dbg(fsp->fsp_name)));
625 if (NT_STATUS_IS_OK(status)) {
627 * Here we've opened with O_CREAT|O_EXCL
628 * and got success. We *know* we created
631 *file_created = true;
634 /* Create is done, or failed. */
640 /****************************************************************************
642 ****************************************************************************/
644 static NTSTATUS open_file(files_struct *fsp,
645 connection_struct *conn,
646 struct smb_request *req,
647 const char *parent_dir,
650 uint32 access_mask, /* client requested access mask. */
651 uint32 open_access_mask, /* what we're actually using in the open. */
652 bool *p_file_created)
654 struct smb_filename *smb_fname = fsp->fsp_name;
655 NTSTATUS status = NT_STATUS_OK;
656 int accmode = (flags & O_ACCMODE);
657 int local_flags = flags;
658 bool file_existed = VALID_STAT(fsp->fsp_name->st);
663 /* Check permissions */
666 * This code was changed after seeing a client open request
667 * containing the open mode of (DENY_WRITE/read-only) with
668 * the 'create if not exist' bit set. The previous code
669 * would fail to open the file read only on a read-only share
670 * as it was checking the flags parameter directly against O_RDONLY,
671 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
675 if (!CAN_WRITE(conn)) {
676 /* It's a read-only share - fail if we wanted to write. */
677 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
678 DEBUG(3,("Permission denied opening %s\n",
679 smb_fname_str_dbg(smb_fname)));
680 return NT_STATUS_ACCESS_DENIED;
681 } else if(flags & O_CREAT) {
682 /* We don't want to write - but we must make sure that
683 O_CREAT doesn't create the file if we have write
684 access into the directory.
686 flags &= ~(O_CREAT|O_EXCL);
687 local_flags &= ~(O_CREAT|O_EXCL);
692 * This little piece of insanity is inspired by the
693 * fact that an NT client can open a file for O_RDONLY,
694 * but set the create disposition to FILE_EXISTS_TRUNCATE.
695 * If the client *can* write to the file, then it expects to
696 * truncate the file, even though it is opening for readonly.
697 * Quicken uses this stupid trick in backup file creation...
698 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
699 * for helping track this one down. It didn't bite us in 2.0.x
700 * as we always opened files read-write in that release. JRA.
703 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
704 DEBUG(10,("open_file: truncate requested on read-only open "
705 "for file %s\n", smb_fname_str_dbg(smb_fname)));
706 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
709 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
710 (!file_existed && (local_flags & O_CREAT)) ||
711 ((local_flags & O_TRUNC) == O_TRUNC) ) {
715 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
717 * We would block on opening a FIFO with no one else on the
718 * other end. Do what we used to do and add O_NONBLOCK to the
722 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
723 local_flags &= ~O_TRUNC; /* Can't truncate a FIFO. */
724 local_flags |= O_NONBLOCK;
728 /* Don't create files with Microsoft wildcard characters. */
731 * wildcard characters are allowed in stream names
732 * only test the basefilename
734 wild = fsp->base_fsp->fsp_name->base_name;
736 wild = smb_fname->base_name;
738 if ((local_flags & O_CREAT) && !file_existed &&
740 return NT_STATUS_OBJECT_NAME_INVALID;
743 /* Can we access this file ? */
744 if (!fsp->base_fsp) {
745 /* Only do this check on non-stream open. */
747 status = smbd_check_access_rights(conn,
751 } else if (local_flags & O_CREAT){
752 status = check_parent_access(conn,
756 /* File didn't exist and no O_CREAT. */
757 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
759 if (!NT_STATUS_IS_OK(status)) {
760 DEBUG(10,("open_file: "
764 "smbd_check_access_rights" :
765 "check_parent_access",
766 smb_fname_str_dbg(smb_fname),
767 nt_errstr(status) ));
772 /* Actually do the open */
773 status = fd_open_atomic(conn, fsp, local_flags,
774 unx_mode, p_file_created);
775 if (!NT_STATUS_IS_OK(status)) {
776 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
777 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
778 nt_errstr(status),local_flags,flags));
782 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
784 /* If we have an fd, this stat should succeed. */
785 DEBUG(0,("Error doing fstat on open file %s "
787 smb_fname_str_dbg(smb_fname),
789 status = map_nt_error_from_unix(errno);
794 if (*p_file_created) {
795 /* We created this file. */
797 bool need_re_stat = false;
798 /* Do all inheritance work after we've
799 done a successful fstat call and filled
800 in the stat struct in fsp->fsp_name. */
802 /* Inherit the ACL if required */
803 if (lp_inherit_perms(SNUM(conn))) {
804 inherit_access_posix_acl(conn, parent_dir,
805 smb_fname->base_name,
810 /* Change the owner if required. */
811 if (lp_inherit_owner(SNUM(conn))) {
812 change_file_owner_to_parent(conn, parent_dir,
818 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
819 /* If we have an fd, this stat should succeed. */
821 DEBUG(0,("Error doing fstat on open file %s "
823 smb_fname_str_dbg(smb_fname),
828 notify_fname(conn, NOTIFY_ACTION_ADDED,
829 FILE_NOTIFY_CHANGE_FILE_NAME,
830 smb_fname->base_name);
833 fsp->fh->fd = -1; /* What we used to call a stat open. */
835 /* File must exist for a stat open. */
836 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
839 status = smbd_check_access_rights(conn,
844 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
846 S_ISLNK(smb_fname->st.st_ex_mode)) {
847 /* This is a POSIX stat open for delete
848 * or rename on a symlink that points
850 DEBUG(10,("open_file: allowing POSIX "
851 "open on bad symlink %s\n",
852 smb_fname_str_dbg(smb_fname)));
853 status = NT_STATUS_OK;
856 if (!NT_STATUS_IS_OK(status)) {
857 DEBUG(10,("open_file: "
858 "smbd_check_access_rights on file "
860 smb_fname_str_dbg(smb_fname),
861 nt_errstr(status) ));
867 * POSIX allows read-only opens of directories. We don't
868 * want to do this (we use a different code path for this)
869 * so catch a directory open and return an EISDIR. JRA.
872 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
875 return NT_STATUS_FILE_IS_A_DIRECTORY;
878 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
879 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
880 fsp->file_pid = req ? req->smbpid : 0;
881 fsp->can_lock = True;
882 fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
885 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
886 fsp->print_file = NULL;
887 fsp->modified = False;
888 fsp->sent_oplock_break = NO_BREAK_SENT;
889 fsp->is_directory = False;
890 if (conn->aio_write_behind_list &&
891 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
892 conn->case_sensitive)) {
893 fsp->aio_write_behind = True;
896 fsp->wcp = NULL; /* Write cache pointer. */
898 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
899 conn->session_info->unix_info->unix_name,
900 smb_fname_str_dbg(smb_fname),
901 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
902 conn->num_files_open));
908 /****************************************************************************
909 Check if we can open a file with a share mode.
910 Returns True if conflict, False if not.
911 ****************************************************************************/
913 static bool share_conflict(struct share_mode_entry *entry,
917 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
918 "entry->share_access = 0x%x, "
919 "entry->private_options = 0x%x\n",
920 (unsigned int)entry->access_mask,
921 (unsigned int)entry->share_access,
922 (unsigned int)entry->private_options));
924 if (server_id_is_disconnected(&entry->pid)) {
926 * note: cleanup should have been done by
927 * delay_for_batch_oplocks()
932 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
933 (unsigned int)access_mask, (unsigned int)share_access));
935 if ((entry->access_mask & (FILE_WRITE_DATA|
939 DELETE_ACCESS)) == 0) {
940 DEBUG(10,("share_conflict: No conflict due to "
941 "entry->access_mask = 0x%x\n",
942 (unsigned int)entry->access_mask ));
946 if ((access_mask & (FILE_WRITE_DATA|
950 DELETE_ACCESS)) == 0) {
951 DEBUG(10,("share_conflict: No conflict due to "
952 "access_mask = 0x%x\n",
953 (unsigned int)access_mask ));
957 #if 1 /* JRA TEST - Superdebug. */
958 #define CHECK_MASK(num, am, right, sa, share) \
959 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
960 (unsigned int)(num), (unsigned int)(am), \
961 (unsigned int)(right), (unsigned int)(am)&(right) )); \
962 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
963 (unsigned int)(num), (unsigned int)(sa), \
964 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
965 if (((am) & (right)) && !((sa) & (share))) { \
966 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
967 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
968 (unsigned int)(share) )); \
972 #define CHECK_MASK(num, am, right, sa, share) \
973 if (((am) & (right)) && !((sa) & (share))) { \
974 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
975 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
976 (unsigned int)(share) )); \
981 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
982 share_access, FILE_SHARE_WRITE);
983 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
984 entry->share_access, FILE_SHARE_WRITE);
986 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
987 share_access, FILE_SHARE_READ);
988 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
989 entry->share_access, FILE_SHARE_READ);
991 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
992 share_access, FILE_SHARE_DELETE);
993 CHECK_MASK(6, access_mask, DELETE_ACCESS,
994 entry->share_access, FILE_SHARE_DELETE);
996 DEBUG(10,("share_conflict: No conflict.\n"));
1000 #if defined(DEVELOPER)
1001 static void validate_my_share_entries(struct smbd_server_connection *sconn,
1003 struct share_mode_entry *share_entry)
1005 struct server_id self = messaging_server_id(sconn->msg_ctx);
1008 if (!serverid_equal(&self, &share_entry->pid)) {
1012 if (is_deferred_open_entry(share_entry) &&
1013 !open_was_deferred(sconn, share_entry->op_mid)) {
1014 char *str = talloc_asprintf(talloc_tos(),
1015 "Got a deferred entry without a request: "
1017 share_mode_str(talloc_tos(), num, share_entry));
1021 if (!is_valid_share_mode_entry(share_entry)) {
1025 fsp = file_find_dif(sconn, share_entry->id,
1026 share_entry->share_file_id);
1028 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1029 share_mode_str(talloc_tos(), num, share_entry) ));
1030 smb_panic("validate_my_share_entries: Cannot match a "
1031 "share entry with an open file\n");
1034 if (is_deferred_open_entry(share_entry)) {
1038 if ((share_entry->op_type == NO_OPLOCK) &&
1039 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
1040 /* Someone has already written to it, but I haven't yet
1045 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
1054 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1055 share_mode_str(talloc_tos(), num, share_entry) ));
1056 str = talloc_asprintf(talloc_tos(),
1057 "validate_my_share_entries: "
1058 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1059 fsp->fsp_name->base_name,
1060 (unsigned int)fsp->oplock_type,
1061 (unsigned int)share_entry->op_type );
1067 bool is_stat_open(uint32 access_mask)
1069 return (access_mask &&
1070 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
1071 FILE_WRITE_ATTRIBUTES))==0) &&
1072 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
1073 FILE_WRITE_ATTRIBUTES)) != 0));
1076 /****************************************************************************
1077 Deal with share modes
1078 Invarient: Share mode must be locked on entry and exit.
1079 Returns -1 on error, or number of share modes on success (may be zero).
1080 ****************************************************************************/
1082 static NTSTATUS open_mode_check(connection_struct *conn,
1083 struct share_mode_lock *lck,
1086 uint32 share_access,
1087 uint32 create_options,
1092 if(lck->data->num_share_modes == 0) {
1093 return NT_STATUS_OK;
1096 /* A delete on close prohibits everything */
1098 if (is_delete_on_close_set(lck, name_hash)) {
1100 * Check the delete on close token
1101 * is valid. It could have been left
1102 * after a server crash.
1104 for(i = 0; i < lck->data->num_share_modes; i++) {
1105 if (!share_mode_stale_pid(lck->data, i)) {
1107 *file_existed = true;
1109 return NT_STATUS_DELETE_PENDING;
1112 return NT_STATUS_OK;
1115 if (is_stat_open(access_mask)) {
1116 /* Stat open that doesn't trigger oplock breaks or share mode
1117 * checks... ! JRA. */
1118 return NT_STATUS_OK;
1122 * Check if the share modes will give us access.
1125 #if defined(DEVELOPER)
1126 for(i = 0; i < lck->data->num_share_modes; i++) {
1127 validate_my_share_entries(conn->sconn, i,
1128 &lck->data->share_modes[i]);
1132 /* Now we check the share modes, after any oplock breaks. */
1133 for(i = 0; i < lck->data->num_share_modes; i++) {
1135 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1139 /* someone else has a share lock on it, check to see if we can
1141 if (share_conflict(&lck->data->share_modes[i],
1142 access_mask, share_access)) {
1144 if (share_mode_stale_pid(lck->data, i)) {
1148 *file_existed = true;
1150 return NT_STATUS_SHARING_VIOLATION;
1154 if (lck->data->num_share_modes != 0) {
1155 *file_existed = true;
1158 return NT_STATUS_OK;
1162 * Send a break message to the oplock holder and delay the open for
1166 static NTSTATUS send_break_message(files_struct *fsp,
1167 struct share_mode_entry *exclusive,
1172 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1174 DEBUG(10, ("Sending break request to PID %s\n",
1175 procid_str_static(&exclusive->pid)));
1176 exclusive->op_mid = mid;
1178 /* Create the message. */
1179 share_mode_entry_to_message(msg, exclusive);
1181 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1182 don't want this set in the share mode struct pointed to by lck. */
1184 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1185 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1186 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1189 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1190 MSG_SMB_BREAK_REQUEST,
1192 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1193 if (!NT_STATUS_IS_OK(status)) {
1194 DEBUG(3, ("Could not send oplock break message: %s\n",
1195 nt_errstr(status)));
1202 * Return share_mode_entry pointers for :
1203 * 1). Batch oplock entry.
1204 * 2). Batch or exclusive oplock entry (may be identical to #1).
1205 * bool have_level2_oplock
1206 * bool have_no_oplock.
1207 * Do internal consistency checks on the share mode for a file.
1210 static void find_oplock_types(files_struct *fsp,
1212 const struct share_mode_lock *lck,
1213 struct share_mode_entry **pp_batch,
1214 struct share_mode_entry **pp_ex_or_batch,
1216 bool *got_no_oplock)
1221 *pp_ex_or_batch = NULL;
1222 *got_level2 = false;
1223 *got_no_oplock = false;
1225 /* Ignore stat or internal opens, as is done in
1226 delay_for_batch_oplocks() and
1227 delay_for_exclusive_oplocks().
1229 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1233 for (i=0; i<lck->data->num_share_modes; i++) {
1234 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1238 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1239 is_stat_open(lck->data->share_modes[i].access_mask)) {
1240 /* We ignore stat opens in the table - they
1241 always have NO_OPLOCK and never get or
1242 cause breaks. JRA. */
1246 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1247 /* batch - can only be one. */
1248 if (share_mode_stale_pid(lck->data, i)) {
1249 DEBUG(10, ("Found stale batch oplock\n"));
1252 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1253 smb_panic("Bad batch oplock entry.");
1255 *pp_batch = &lck->data->share_modes[i];
1258 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1259 if (share_mode_stale_pid(lck->data, i)) {
1260 DEBUG(10, ("Found stale duplicate oplock\n"));
1263 /* Exclusive or batch - can only be one. */
1264 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1265 smb_panic("Bad exclusive or batch oplock entry.");
1267 *pp_ex_or_batch = &lck->data->share_modes[i];
1270 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1271 if (*pp_batch || *pp_ex_or_batch) {
1272 if (share_mode_stale_pid(lck->data, i)) {
1273 DEBUG(10, ("Found stale LevelII "
1277 smb_panic("Bad levelII oplock entry.");
1282 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1283 if (*pp_batch || *pp_ex_or_batch) {
1284 if (share_mode_stale_pid(lck->data, i)) {
1285 DEBUG(10, ("Found stale NO_OPLOCK "
1289 smb_panic("Bad no oplock entry.");
1291 *got_no_oplock = true;
1296 static bool delay_for_batch_oplocks(files_struct *fsp,
1299 struct share_mode_entry *batch_entry)
1301 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1304 if (batch_entry == NULL) {
1308 if (server_id_is_disconnected(&batch_entry->pid)) {
1311 * This could be achieved by sending a break message
1312 * to ourselves. Special considerations for files
1313 * with delete_on_close flag set!
1315 * For now we keep it simple and do not
1316 * allow delete on close for durable handles.
1321 /* Found a batch oplock */
1322 send_break_message(fsp, batch_entry, mid, oplock_request);
1326 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1329 struct share_mode_entry *ex_entry)
1331 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1334 if (ex_entry == NULL) {
1338 if (server_id_is_disconnected(&ex_entry->pid)) {
1340 * since only durable handles can get disconnected,
1341 * and we can only get durable handles with batch oplocks,
1342 * this should actually never be reached...
1347 send_break_message(fsp, ex_entry, mid, oplock_request);
1351 static bool file_has_brlocks(files_struct *fsp)
1353 struct byte_range_lock *br_lck;
1355 br_lck = brl_get_locks_readonly(fsp);
1359 return br_lck->num_locks > 0 ? true : false;
1362 static void grant_fsp_oplock_type(files_struct *fsp,
1364 bool got_level2_oplock,
1365 bool got_a_none_oplock)
1367 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1368 lp_level2_oplocks(SNUM(fsp->conn));
1370 /* Start by granting what the client asked for,
1371 but ensure no SAMBA_PRIVATE bits can be set. */
1372 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1374 if (oplock_request & INTERNAL_OPEN_ONLY) {
1375 /* No oplocks on internal open. */
1376 fsp->oplock_type = NO_OPLOCK;
1377 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1378 fsp->oplock_type, fsp_str_dbg(fsp)));
1382 if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1383 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1385 fsp->oplock_type = NO_OPLOCK;
1388 if (is_stat_open(fsp->access_mask)) {
1389 /* Leave the value already set. */
1390 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1391 fsp->oplock_type, fsp_str_dbg(fsp)));
1396 * Match what was requested (fsp->oplock_type) with
1397 * what was found in the existing share modes.
1400 if (got_a_none_oplock) {
1401 fsp->oplock_type = NO_OPLOCK;
1402 } else if (got_level2_oplock) {
1403 if (fsp->oplock_type == NO_OPLOCK ||
1404 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1405 /* Store a level2 oplock, but don't tell the client */
1406 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1408 fsp->oplock_type = LEVEL_II_OPLOCK;
1411 /* All share_mode_entries are placeholders or deferred.
1412 * Silently upgrade to fake levelII if the client didn't
1413 * ask for an oplock. */
1414 if (fsp->oplock_type == NO_OPLOCK) {
1415 /* Store a level2 oplock, but don't tell the client */
1416 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1421 * Don't grant level2 to clients that don't want them
1422 * or if we've turned them off.
1424 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1425 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1428 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1429 fsp->oplock_type, fsp_str_dbg(fsp)));
1432 static bool request_timed_out(struct timeval request_time,
1433 struct timeval timeout)
1435 struct timeval now, end_time;
1437 end_time = timeval_sum(&request_time, &timeout);
1438 return (timeval_compare(&end_time, &now) < 0);
1441 /****************************************************************************
1442 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1443 ****************************************************************************/
1445 static void defer_open(struct share_mode_lock *lck,
1446 struct timeval request_time,
1447 struct timeval timeout,
1448 struct smb_request *req,
1449 struct deferred_open_record *state)
1451 struct server_id self = messaging_server_id(req->sconn->msg_ctx);
1453 /* Paranoia check */
1458 for (i=0; i<lck->data->num_share_modes; i++) {
1459 struct share_mode_entry *e = &lck->data->share_modes[i];
1461 if (is_deferred_open_entry(e) &&
1462 serverid_equal(&self, &e->pid) &&
1463 (e->op_mid == req->mid)) {
1464 DEBUG(0, ("Trying to defer an already deferred "
1465 "request: mid=%llu, exiting\n",
1466 (unsigned long long)req->mid));
1467 exit_server("attempt to defer a deferred request");
1472 /* End paranoia check */
1474 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1475 "open entry for mid %llu\n",
1476 (unsigned int)request_time.tv_sec,
1477 (unsigned int)request_time.tv_usec,
1478 (unsigned long long)req->mid));
1480 if (!push_deferred_open_message_smb(req, request_time, timeout,
1481 state->id, (char *)state, sizeof(*state))) {
1482 exit_server("push_deferred_open_message_smb failed");
1485 add_deferred_open(lck, req->mid, request_time, self, state->id);
1490 /****************************************************************************
1491 On overwrite open ensure that the attributes match.
1492 ****************************************************************************/
1494 static bool open_match_attributes(connection_struct *conn,
1495 uint32 old_dos_attr,
1496 uint32 new_dos_attr,
1497 mode_t existing_unx_mode,
1498 mode_t new_unx_mode,
1499 mode_t *returned_unx_mode)
1501 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1503 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1504 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1506 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1507 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1508 *returned_unx_mode = new_unx_mode;
1510 *returned_unx_mode = (mode_t)0;
1513 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1514 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1515 "returned_unx_mode = 0%o\n",
1516 (unsigned int)old_dos_attr,
1517 (unsigned int)existing_unx_mode,
1518 (unsigned int)new_dos_attr,
1519 (unsigned int)*returned_unx_mode ));
1521 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1522 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1523 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1524 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1528 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1529 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1530 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1537 /****************************************************************************
1538 Special FCB or DOS processing in the case of a sharing violation.
1539 Try and find a duplicated file handle.
1540 ****************************************************************************/
1542 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1543 connection_struct *conn,
1544 files_struct *fsp_to_dup_into,
1545 const struct smb_filename *smb_fname,
1550 uint32 share_access,
1551 uint32 create_options)
1555 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1556 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1558 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1559 fsp = file_find_di_next(fsp)) {
1561 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1562 "vuid = %llu, file_pid = %u, private_options = 0x%x "
1563 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1564 fsp->fh->fd, (unsigned long long)fsp->vuid,
1565 (unsigned int)fsp->file_pid,
1566 (unsigned int)fsp->fh->private_options,
1567 (unsigned int)fsp->access_mask ));
1569 if (fsp->fh->fd != -1 &&
1570 fsp->vuid == vuid &&
1571 fsp->file_pid == file_pid &&
1572 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1573 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1574 (fsp->access_mask & FILE_WRITE_DATA) &&
1575 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1576 strequal(fsp->fsp_name->stream_name,
1577 smb_fname->stream_name)) {
1578 DEBUG(10,("fcb_or_dos_open: file match\n"));
1584 return NT_STATUS_NOT_FOUND;
1587 /* quite an insane set of semantics ... */
1588 if (is_executable(smb_fname->base_name) &&
1589 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1590 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1591 return NT_STATUS_INVALID_PARAMETER;
1594 /* We need to duplicate this fsp. */
1595 return dup_file_fsp(req, fsp, access_mask, share_access,
1596 create_options, fsp_to_dup_into);
1599 static void schedule_defer_open(struct share_mode_lock *lck,
1600 struct timeval request_time,
1601 struct smb_request *req)
1603 struct deferred_open_record state;
1605 /* This is a relative time, added to the absolute
1606 request_time value to get the absolute timeout time.
1607 Note that if this is the second or greater time we enter
1608 this codepath for this particular request mid then
1609 request_time is left as the absolute time of the *first*
1610 time this request mid was processed. This is what allows
1611 the request to eventually time out. */
1613 struct timeval timeout;
1615 /* Normally the smbd we asked should respond within
1616 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1617 * the client did, give twice the timeout as a safety
1618 * measure here in case the other smbd is stuck
1619 * somewhere else. */
1621 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1623 /* Nothing actually uses state.delayed_for_oplocks
1624 but it's handy to differentiate in debug messages
1625 between a 30 second delay due to oplock break, and
1626 a 1 second delay for share mode conflicts. */
1628 state.delayed_for_oplocks = True;
1629 state.async_open = false;
1630 state.id = lck->data->id;
1632 if (!request_timed_out(request_time, timeout)) {
1633 defer_open(lck, request_time, timeout, req, &state);
1637 /****************************************************************************
1638 Reschedule an open call that went asynchronous.
1639 ****************************************************************************/
1641 static void schedule_async_open(struct timeval request_time,
1642 struct smb_request *req)
1644 struct deferred_open_record state;
1645 struct timeval timeout;
1647 timeout = timeval_set(20, 0);
1650 state.delayed_for_oplocks = false;
1651 state.async_open = true;
1653 if (!request_timed_out(request_time, timeout)) {
1654 defer_open(NULL, request_time, timeout, req, &state);
1658 /****************************************************************************
1659 Work out what access_mask to use from what the client sent us.
1660 ****************************************************************************/
1662 static NTSTATUS smbd_calculate_maximum_allowed_access(
1663 connection_struct *conn,
1664 const struct smb_filename *smb_fname,
1665 uint32_t *p_access_mask)
1667 struct security_descriptor *sd;
1668 uint32_t access_granted;
1671 if (get_current_uid(conn) == (uid_t)0) {
1672 *p_access_mask |= FILE_GENERIC_ALL;
1673 return NT_STATUS_OK;
1676 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1681 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1683 * File did not exist
1685 *p_access_mask = FILE_GENERIC_ALL;
1686 return NT_STATUS_OK;
1688 if (!NT_STATUS_IS_OK(status)) {
1689 DEBUG(10,("smbd_calculate_access_mask: "
1690 "Could not get acl on file %s: %s\n",
1691 smb_fname_str_dbg(smb_fname),
1692 nt_errstr(status)));
1693 return NT_STATUS_ACCESS_DENIED;
1697 * Never test FILE_READ_ATTRIBUTES. se_file_access_check()
1698 * also takes care of owner WRITE_DAC and READ_CONTROL.
1700 status = se_file_access_check(sd,
1701 get_current_nttok(conn),
1703 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1708 if (!NT_STATUS_IS_OK(status)) {
1709 DEBUG(10, ("smbd_calculate_access_mask: "
1710 "Access denied on file %s: "
1711 "when calculating maximum access\n",
1712 smb_fname_str_dbg(smb_fname)));
1713 return NT_STATUS_ACCESS_DENIED;
1715 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1716 return NT_STATUS_OK;
1719 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1720 const struct smb_filename *smb_fname,
1721 uint32_t access_mask,
1722 uint32_t *access_mask_out)
1725 uint32_t orig_access_mask = access_mask;
1726 uint32_t rejected_share_access;
1729 * Convert GENERIC bits to specific bits.
1732 se_map_generic(&access_mask, &file_generic_mapping);
1734 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1735 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1737 status = smbd_calculate_maximum_allowed_access(
1738 conn, smb_fname, &access_mask);
1740 if (!NT_STATUS_IS_OK(status)) {
1744 access_mask &= conn->share_access;
1747 rejected_share_access = access_mask & ~(conn->share_access);
1749 if (rejected_share_access) {
1750 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1751 "file %s: rejected by share access mask[0x%08X] "
1752 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1753 smb_fname_str_dbg(smb_fname),
1755 orig_access_mask, access_mask,
1756 rejected_share_access));
1757 return NT_STATUS_ACCESS_DENIED;
1760 *access_mask_out = access_mask;
1761 return NT_STATUS_OK;
1764 /****************************************************************************
1765 Remove the deferred open entry under lock.
1766 ****************************************************************************/
1768 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1769 struct server_id pid)
1771 struct share_mode_lock *lck = get_existing_share_mode_lock(
1774 DEBUG(0, ("could not get share mode lock\n"));
1777 del_deferred_open_entry(lck, mid, pid);
1781 /****************************************************************************
1782 Return true if this is a state pointer to an asynchronous create.
1783 ****************************************************************************/
1785 bool is_deferred_open_async(const void *ptr)
1787 const struct deferred_open_record *state = (const struct deferred_open_record *)ptr;
1789 return state->async_open;
1792 static bool clear_ads(uint32_t create_disposition)
1796 switch (create_disposition) {
1797 case FILE_SUPERSEDE:
1798 case FILE_OVERWRITE_IF:
1799 case FILE_OVERWRITE:
1808 static int disposition_to_open_flags(uint32_t create_disposition)
1813 * Currently we're using FILE_SUPERSEDE as the same as
1814 * FILE_OVERWRITE_IF but they really are
1815 * different. FILE_SUPERSEDE deletes an existing file
1816 * (requiring delete access) then recreates it.
1819 switch (create_disposition) {
1820 case FILE_SUPERSEDE:
1821 case FILE_OVERWRITE_IF:
1823 * If file exists replace/overwrite. If file doesn't
1826 ret = O_CREAT|O_TRUNC;
1831 * If file exists open. If file doesn't exist error.
1836 case FILE_OVERWRITE:
1838 * If file exists overwrite. If file doesn't exist
1846 * If file exists error. If file doesn't exist create.
1848 ret = O_CREAT|O_EXCL;
1853 * If file exists open. If file doesn't exist create.
1861 /****************************************************************************
1862 Open a file with a share mode. Passed in an already created files_struct *.
1863 ****************************************************************************/
1865 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1866 struct smb_request *req,
1867 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1868 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1869 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1870 uint32 create_options, /* options such as delete on close. */
1871 uint32 new_dos_attributes, /* attributes used for new file. */
1872 int oplock_request, /* internal Samba oplock codes. */
1873 /* Information (FILE_EXISTS etc.) */
1874 uint32_t private_flags, /* Samba specific flags. */
1878 struct smb_filename *smb_fname = fsp->fsp_name;
1881 bool file_existed = VALID_STAT(smb_fname->st);
1882 bool def_acl = False;
1883 bool posix_open = False;
1884 bool new_file_created = False;
1885 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1886 mode_t new_unx_mode = (mode_t)0;
1887 mode_t unx_mode = (mode_t)0;
1889 uint32 existing_dos_attributes = 0;
1890 struct timeval request_time = timeval_zero();
1891 struct share_mode_lock *lck = NULL;
1892 uint32 open_access_mask = access_mask;
1895 SMB_STRUCT_STAT saved_stat = smb_fname->st;
1897 if (conn->printer) {
1899 * Printers are handled completely differently.
1900 * Most of the passed parameters are ignored.
1904 *pinfo = FILE_WAS_CREATED;
1907 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1908 smb_fname_str_dbg(smb_fname)));
1911 DEBUG(0,("open_file_ntcreate: printer open without "
1912 "an SMB request!\n"));
1913 return NT_STATUS_INTERNAL_ERROR;
1916 return print_spool_open(fsp, smb_fname->base_name,
1920 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1922 return NT_STATUS_NO_MEMORY;
1925 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1927 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1928 new_dos_attributes = 0;
1930 /* Windows allows a new file to be created and
1931 silently removes a FILE_ATTRIBUTE_DIRECTORY
1932 sent by the client. Do the same. */
1934 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1936 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1938 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1939 smb_fname, parent_dir);
1942 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1943 "access_mask=0x%x share_access=0x%x "
1944 "create_disposition = 0x%x create_options=0x%x "
1945 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1946 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1947 access_mask, share_access, create_disposition,
1948 create_options, (unsigned int)unx_mode, oplock_request,
1949 (unsigned int)private_flags));
1951 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1952 DEBUG(0, ("No smb request but not an internal only open!\n"));
1953 return NT_STATUS_INTERNAL_ERROR;
1957 * Only non-internal opens can be deferred at all
1962 if (get_deferred_open_message_state(req,
1965 /* Remember the absolute time of the original
1966 request with this mid. We'll use it later to
1967 see if this has timed out. */
1969 /* If it was an async create retry, the file
1972 if (is_deferred_open_async(ptr)) {
1973 SET_STAT_INVALID(smb_fname->st);
1974 file_existed = false;
1976 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1977 /* Remove the deferred open entry under lock. */
1978 remove_deferred_open_entry(
1979 state->id, req->mid,
1980 messaging_server_id(req->sconn->msg_ctx));
1983 /* Ensure we don't reprocess this message. */
1984 remove_deferred_open_message_smb(req->sconn, req->mid);
1989 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1991 existing_dos_attributes = dos_mode(conn, smb_fname);
1995 /* ignore any oplock requests if oplocks are disabled */
1996 if (!lp_oplocks(SNUM(conn)) ||
1997 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1998 /* Mask off everything except the private Samba bits. */
1999 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
2002 /* this is for OS/2 long file names - say we don't support them */
2003 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
2004 /* OS/2 Workplace shell fix may be main code stream in a later
2006 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
2008 if (use_nt_status()) {
2009 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2011 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
2014 switch( create_disposition ) {
2016 /* If file exists open. If file doesn't exist error. */
2017 if (!file_existed) {
2018 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
2019 "requested for file %s and file "
2021 smb_fname_str_dbg(smb_fname)));
2023 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2027 case FILE_OVERWRITE:
2028 /* If file exists overwrite. If file doesn't exist
2030 if (!file_existed) {
2031 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
2032 "requested for file %s and file "
2034 smb_fname_str_dbg(smb_fname) ));
2036 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2041 /* If file exists error. If file doesn't exist
2044 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
2045 "requested for file %s and file "
2046 "already exists.\n",
2047 smb_fname_str_dbg(smb_fname)));
2048 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
2053 return map_nt_error_from_unix(errno);
2057 case FILE_SUPERSEDE:
2058 case FILE_OVERWRITE_IF:
2062 return NT_STATUS_INVALID_PARAMETER;
2065 flags2 = disposition_to_open_flags(create_disposition);
2067 /* We only care about matching attributes on file exists and
2070 if (!posix_open && file_existed &&
2071 ((create_disposition == FILE_OVERWRITE) ||
2072 (create_disposition == FILE_OVERWRITE_IF))) {
2073 if (!open_match_attributes(conn, existing_dos_attributes,
2075 smb_fname->st.st_ex_mode,
2076 unx_mode, &new_unx_mode)) {
2077 DEBUG(5,("open_file_ntcreate: attributes missmatch "
2078 "for file %s (%x %x) (0%o, 0%o)\n",
2079 smb_fname_str_dbg(smb_fname),
2080 existing_dos_attributes,
2082 (unsigned int)smb_fname->st.st_ex_mode,
2083 (unsigned int)unx_mode ));
2085 return NT_STATUS_ACCESS_DENIED;
2089 status = smbd_calculate_access_mask(conn, smb_fname,
2092 if (!NT_STATUS_IS_OK(status)) {
2093 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2094 "on file %s returned %s\n",
2095 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2099 open_access_mask = access_mask;
2101 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2102 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2105 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2106 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2110 * Note that we ignore the append flag as append does not
2111 * mean the same thing under DOS and Unix.
2114 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
2115 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2116 /* DENY_DOS opens are always underlying read-write on the
2117 file handle, no matter what the requested access mask
2119 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
2120 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
2130 * Currently we only look at FILE_WRITE_THROUGH for create options.
2134 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2139 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2143 if (!posix_open && !CAN_WRITE(conn)) {
2145 * We should really return a permission denied error if either
2146 * O_CREAT or O_TRUNC are set, but for compatibility with
2147 * older versions of Samba we just AND them out.
2149 flags2 &= ~(O_CREAT|O_TRUNC);
2153 * Ensure we can't write on a read-only share or file.
2156 if (flags != O_RDONLY && file_existed &&
2157 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2158 DEBUG(5,("open_file_ntcreate: write access requested for "
2159 "file %s on read only %s\n",
2160 smb_fname_str_dbg(smb_fname),
2161 !CAN_WRITE(conn) ? "share" : "file" ));
2163 return NT_STATUS_ACCESS_DENIED;
2166 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2167 fsp->share_access = share_access;
2168 fsp->fh->private_options = private_flags;
2169 fsp->access_mask = open_access_mask; /* We change this to the
2170 * requested access_mask after
2171 * the open is done. */
2172 fsp->posix_open = posix_open;
2174 /* Ensure no SAMBA_PRIVATE bits can be set. */
2175 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2177 if (timeval_is_zero(&request_time)) {
2178 request_time = fsp->open_time;
2182 struct share_mode_entry *batch_entry = NULL;
2183 struct share_mode_entry *exclusive_entry = NULL;
2184 bool got_level2_oplock = false;
2185 bool got_a_none_oplock = false;
2188 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2189 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2191 lck = get_share_mode_lock(talloc_tos(), id,
2193 smb_fname, &old_write_time);
2195 DEBUG(0, ("Could not get share mode lock\n"));
2196 return NT_STATUS_SHARING_VIOLATION;
2199 /* Get the types we need to examine. */
2200 find_oplock_types(fsp,
2206 &got_a_none_oplock);
2208 /* First pass - send break only on batch oplocks. */
2209 if ((req != NULL) &&
2210 delay_for_batch_oplocks(fsp,
2214 schedule_defer_open(lck, request_time, req);
2216 return NT_STATUS_SHARING_VIOLATION;
2219 /* Use the client requested access mask here, not the one we
2221 status = open_mode_check(conn, lck, fsp->name_hash,
2222 access_mask, share_access,
2223 create_options, &file_existed);
2225 if (NT_STATUS_IS_OK(status)) {
2226 /* We might be going to allow this open. Check oplock
2228 /* Second pass - send break for both batch or
2229 * exclusive oplocks. */
2230 if ((req != NULL) &&
2231 delay_for_exclusive_oplocks(
2236 schedule_defer_open(lck, request_time, req);
2238 return NT_STATUS_SHARING_VIOLATION;
2242 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2243 /* DELETE_PENDING is not deferred for a second */
2248 grant_fsp_oplock_type(fsp,
2253 if (!NT_STATUS_IS_OK(status)) {
2254 uint32 can_access_mask;
2255 bool can_access = True;
2257 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2259 /* Check if this can be done with the deny_dos and fcb
2262 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2263 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2265 DEBUG(0, ("DOS open without an SMB "
2268 return NT_STATUS_INTERNAL_ERROR;
2271 /* Use the client requested access mask here,
2272 * not the one we open with. */
2273 status = fcb_or_dos_open(req,
2284 if (NT_STATUS_IS_OK(status)) {
2287 *pinfo = FILE_WAS_OPENED;
2289 return NT_STATUS_OK;
2294 * This next line is a subtlety we need for
2295 * MS-Access. If a file open will fail due to share
2296 * permissions and also for security (access) reasons,
2297 * we need to return the access failed error, not the
2298 * share error. We can't open the file due to kernel
2299 * oplock deadlock (it's possible we failed above on
2300 * the open_mode_check()) so use a userspace check.
2303 if (flags & O_RDWR) {
2304 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2305 } else if (flags & O_WRONLY) {
2306 can_access_mask = FILE_WRITE_DATA;
2308 can_access_mask = FILE_READ_DATA;
2311 if (((can_access_mask & FILE_WRITE_DATA) &&
2312 !CAN_WRITE(conn)) ||
2313 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2316 can_access_mask))) {
2321 * If we're returning a share violation, ensure we
2322 * cope with the braindead 1 second delay.
2325 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2326 lp_defer_sharing_violations()) {
2327 struct timeval timeout;
2328 struct deferred_open_record state;
2331 /* this is a hack to speed up torture tests
2333 timeout_usecs = lp_parm_int(SNUM(conn),
2334 "smbd","sharedelay",
2335 SHARING_VIOLATION_USEC_WAIT);
2337 /* This is a relative time, added to the absolute
2338 request_time value to get the absolute timeout time.
2339 Note that if this is the second or greater time we enter
2340 this codepath for this particular request mid then
2341 request_time is left as the absolute time of the *first*
2342 time this request mid was processed. This is what allows
2343 the request to eventually time out. */
2345 timeout = timeval_set(0, timeout_usecs);
2347 /* Nothing actually uses state.delayed_for_oplocks
2348 but it's handy to differentiate in debug messages
2349 between a 30 second delay due to oplock break, and
2350 a 1 second delay for share mode conflicts. */
2352 state.delayed_for_oplocks = False;
2353 state.async_open = false;
2357 && !request_timed_out(request_time,
2359 defer_open(lck, request_time, timeout,
2367 * We have detected a sharing violation here
2368 * so return the correct error code
2370 status = NT_STATUS_SHARING_VIOLATION;
2372 status = NT_STATUS_ACCESS_DENIED;
2378 * We exit this block with the share entry *locked*.....
2382 SMB_ASSERT(!file_existed || (lck != NULL));
2385 * Ensure we pay attention to default ACLs on directories if required.
2388 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2389 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2390 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2393 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2394 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2395 (unsigned int)flags, (unsigned int)flags2,
2396 (unsigned int)unx_mode, (unsigned int)access_mask,
2397 (unsigned int)open_access_mask));
2399 fsp_open = open_file(fsp, conn, req, parent_dir,
2400 flags|flags2, unx_mode, access_mask,
2401 open_access_mask, &new_file_created);
2403 if (!NT_STATUS_IS_OK(fsp_open)) {
2404 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2405 schedule_async_open(request_time, req);
2411 if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
2413 * The file did exist, but some other (local or NFS)
2414 * process either renamed/unlinked and re-created the
2415 * file with different dev/ino after we walked the path,
2416 * but before we did the open. We could retry the
2417 * open but it's a rare enough case it's easier to
2418 * just fail the open to prevent creating any problems
2419 * in the open file db having the wrong dev/ino key.
2423 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
2424 "Old (dev=0x%llu, ino =0x%llu). "
2425 "New (dev=0x%llu, ino=0x%llu). Failing open "
2426 " with NT_STATUS_ACCESS_DENIED.\n",
2427 smb_fname_str_dbg(smb_fname),
2428 (unsigned long long)saved_stat.st_ex_dev,
2429 (unsigned long long)saved_stat.st_ex_ino,
2430 (unsigned long long)smb_fname->st.st_ex_dev,
2431 (unsigned long long)smb_fname->st.st_ex_ino));
2432 return NT_STATUS_ACCESS_DENIED;
2435 if (!file_existed) {
2436 struct share_mode_entry *batch_entry = NULL;
2437 struct share_mode_entry *exclusive_entry = NULL;
2438 bool got_level2_oplock = false;
2439 bool got_a_none_oplock = false;
2440 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2443 * Deal with the race condition where two smbd's detect the
2444 * file doesn't exist and do the create at the same time. One
2445 * of them will win and set a share mode, the other (ie. this
2446 * one) should check if the requested share mode for this
2447 * create is allowed.
2451 * Now the file exists and fsp is successfully opened,
2452 * fsp->dev and fsp->inode are valid and should replace the
2453 * dev=0,inode=0 from a non existent file. Spotted by
2454 * Nadav Danieli <nadavd@exanet.com>. JRA.
2459 lck = get_share_mode_lock(talloc_tos(), id,
2461 smb_fname, &old_write_time);
2464 DEBUG(0, ("open_file_ntcreate: Could not get share "
2465 "mode lock for %s\n",
2466 smb_fname_str_dbg(smb_fname)));
2468 return NT_STATUS_SHARING_VIOLATION;
2471 /* Get the types we need to examine. */
2472 find_oplock_types(fsp,
2478 &got_a_none_oplock);
2480 /* First pass - send break only on batch oplocks. */
2481 if ((req != NULL) &&
2482 delay_for_batch_oplocks(fsp,
2486 schedule_defer_open(lck, request_time, req);
2489 return NT_STATUS_SHARING_VIOLATION;
2492 status = open_mode_check(conn, lck, fsp->name_hash,
2493 access_mask, share_access,
2494 create_options, &file_existed);
2496 if (NT_STATUS_IS_OK(status)) {
2497 /* We might be going to allow this open. Check oplock
2499 /* Second pass - send break for both batch or
2500 * exclusive oplocks. */
2501 if ((req != NULL) &&
2502 delay_for_exclusive_oplocks(
2507 schedule_defer_open(lck, request_time, req);
2510 return NT_STATUS_SHARING_VIOLATION;
2514 if (!NT_STATUS_IS_OK(status)) {
2515 struct deferred_open_record state;
2517 state.delayed_for_oplocks = False;
2518 state.async_open = false;
2521 /* Do it all over again immediately. In the second
2522 * round we will find that the file existed and handle
2523 * the DELETE_PENDING and FCB cases correctly. No need
2524 * to duplicate the code here. Essentially this is a
2525 * "goto top of this function", but don't tell
2529 defer_open(lck, request_time, timeval_zero(),
2537 grant_fsp_oplock_type(fsp,
2543 * We exit this block with the share entry *locked*.....
2548 SMB_ASSERT(lck != NULL);
2550 /* Delete streams if create_disposition requires it */
2551 if (!new_file_created && clear_ads(create_disposition) &&
2552 !is_ntfs_stream_smb_fname(smb_fname)) {
2553 status = delete_all_streams(conn, smb_fname->base_name);
2554 if (!NT_STATUS_IS_OK(status)) {
2561 /* note that we ignore failure for the following. It is
2562 basically a hack for NFS, and NFS will never set one of
2563 these only read them. Nobody but Samba can ever set a deny
2564 mode and we have already checked our more authoritative
2565 locking database for permission to set this deny mode. If
2566 the kernel refuses the operations then the kernel is wrong.
2567 note that GPFS supports it as well - jmcd */
2569 if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
2571 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2572 if(ret_flock == -1 ){
2577 return NT_STATUS_SHARING_VIOLATION;
2582 * At this point onwards, we can guarentee that the share entry
2583 * is locked, whether we created the file or not, and that the
2584 * deny mode is compatible with all current opens.
2588 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2589 * but we don't have to store this - just ignore it on access check.
2591 if (conn->sconn->using_smb2) {
2593 * SMB2 doesn't return it (according to Microsoft tests).
2594 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2595 * File created with access = 0x7 (Read, Write, Delete)
2596 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2598 fsp->access_mask = access_mask;
2600 /* But SMB1 does. */
2601 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2605 /* stat opens on existing files don't get oplocks. */
2606 if (is_stat_open(open_access_mask)) {
2607 fsp->oplock_type = NO_OPLOCK;
2611 if (new_file_created) {
2612 info = FILE_WAS_CREATED;
2614 if (flags2 & O_TRUNC) {
2615 info = FILE_WAS_OVERWRITTEN;
2617 info = FILE_WAS_OPENED;
2626 * Setup the oplock info in both the shared memory and
2630 status = set_file_oplock(fsp, fsp->oplock_type);
2631 if (!NT_STATUS_IS_OK(status)) {
2633 * Could not get the kernel oplock or there are byte-range
2634 * locks on the file.
2636 fsp->oplock_type = NO_OPLOCK;
2639 set_share_mode(lck, fsp, get_current_uid(conn),
2643 /* Handle strange delete on close create semantics. */
2644 if (create_options & FILE_DELETE_ON_CLOSE) {
2646 status = can_set_delete_on_close(fsp, new_dos_attributes);
2648 if (!NT_STATUS_IS_OK(status)) {
2649 /* Remember to delete the mode we just added. */
2650 del_share_mode(lck, fsp);
2655 /* Note that here we set the *inital* delete on close flag,
2656 not the regular one. The magic gets handled in close. */
2657 fsp->initial_delete_on_close = True;
2660 if (info != FILE_WAS_OPENED) {
2661 /* Files should be initially set as archive */
2662 if (lp_map_archive(SNUM(conn)) ||
2663 lp_store_dos_attributes(SNUM(conn))) {
2665 if (file_set_dosmode(conn, smb_fname,
2666 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2667 parent_dir, true) == 0) {
2668 unx_mode = smb_fname->st.st_ex_mode;
2674 /* Determine sparse flag. */
2676 /* POSIX opens are sparse by default. */
2677 fsp->is_sparse = true;
2679 fsp->is_sparse = (file_existed &&
2680 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2684 * Take care of inherited ACLs on created files - if default ACL not
2688 if (!posix_open && new_file_created && !def_acl) {
2690 int saved_errno = errno; /* We might get ENOSYS in the next
2693 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2695 errno = saved_errno; /* Ignore ENOSYS */
2698 } else if (new_unx_mode) {
2702 /* Attributes need changing. File already existed. */
2705 int saved_errno = errno; /* We might get ENOSYS in the
2707 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2709 if (ret == -1 && errno == ENOSYS) {
2710 errno = saved_errno; /* Ignore ENOSYS */
2712 DEBUG(5, ("open_file_ntcreate: reset "
2713 "attributes of file %s to 0%o\n",
2714 smb_fname_str_dbg(smb_fname),
2715 (unsigned int)new_unx_mode));
2716 ret = 0; /* Don't do the fchmod below. */
2721 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2722 DEBUG(5, ("open_file_ntcreate: failed to reset "
2723 "attributes of file %s to 0%o\n",
2724 smb_fname_str_dbg(smb_fname),
2725 (unsigned int)new_unx_mode));
2728 /* If this is a successful open, we must remove any deferred open
2731 del_deferred_open_entry(lck, req->mid,
2732 messaging_server_id(req->sconn->msg_ctx));
2736 return NT_STATUS_OK;
2740 /****************************************************************************
2741 Open a file for for write to ensure that we can fchmod it.
2742 ****************************************************************************/
2744 NTSTATUS open_file_fchmod(connection_struct *conn,
2745 struct smb_filename *smb_fname,
2746 files_struct **result)
2748 if (!VALID_STAT(smb_fname->st)) {
2749 return NT_STATUS_INVALID_PARAMETER;
2752 return SMB_VFS_CREATE_FILE(
2755 0, /* root_dir_fid */
2756 smb_fname, /* fname */
2757 FILE_WRITE_DATA, /* access_mask */
2758 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2760 FILE_OPEN, /* create_disposition*/
2761 0, /* create_options */
2762 0, /* file_attributes */
2763 INTERNAL_OPEN_ONLY, /* oplock_request */
2764 0, /* allocation_size */
2765 0, /* private_flags */
2768 result, /* result */
2772 static NTSTATUS mkdir_internal(connection_struct *conn,
2773 struct smb_filename *smb_dname,
2774 uint32 file_attributes)
2777 char *parent_dir = NULL;
2779 bool posix_open = false;
2780 bool need_re_stat = false;
2781 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2783 if(access_mask & ~(conn->share_access)) {
2784 DEBUG(5,("mkdir_internal: failing share access "
2785 "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
2786 return NT_STATUS_ACCESS_DENIED;
2789 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2791 return NT_STATUS_NO_MEMORY;
2794 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2796 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2798 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2801 status = check_parent_access(conn,
2804 if(!NT_STATUS_IS_OK(status)) {
2805 DEBUG(5,("mkdir_internal: check_parent_access "
2806 "on directory %s for path %s returned %s\n",
2808 smb_dname->base_name,
2809 nt_errstr(status) ));
2813 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2814 return map_nt_error_from_unix(errno);
2817 /* Ensure we're checking for a symlink here.... */
2818 /* We don't want to get caught by a symlink racer. */
2820 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2821 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2822 smb_fname_str_dbg(smb_dname), strerror(errno)));
2823 return map_nt_error_from_unix(errno);
2826 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2827 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2828 smb_fname_str_dbg(smb_dname)));
2829 return NT_STATUS_NOT_A_DIRECTORY;
2832 if (lp_store_dos_attributes(SNUM(conn))) {
2834 file_set_dosmode(conn, smb_dname,
2835 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2840 if (lp_inherit_perms(SNUM(conn))) {
2841 inherit_access_posix_acl(conn, parent_dir,
2842 smb_dname->base_name, mode);
2843 need_re_stat = true;
2848 * Check if high bits should have been set,
2849 * then (if bits are missing): add them.
2850 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2853 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2854 (mode & ~smb_dname->st.st_ex_mode)) {
2855 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2856 (smb_dname->st.st_ex_mode |
2857 (mode & ~smb_dname->st.st_ex_mode)));
2858 need_re_stat = true;
2862 /* Change the owner if required. */
2863 if (lp_inherit_owner(SNUM(conn))) {
2864 change_dir_owner_to_parent(conn, parent_dir,
2865 smb_dname->base_name,
2867 need_re_stat = true;
2871 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2872 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2873 smb_fname_str_dbg(smb_dname), strerror(errno)));
2874 return map_nt_error_from_unix(errno);
2878 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2879 smb_dname->base_name);
2881 return NT_STATUS_OK;
2884 /****************************************************************************
2885 Open a directory from an NT SMB call.
2886 ****************************************************************************/
2888 static NTSTATUS open_directory(connection_struct *conn,
2889 struct smb_request *req,
2890 struct smb_filename *smb_dname,
2892 uint32 share_access,
2893 uint32 create_disposition,
2894 uint32 create_options,
2895 uint32 file_attributes,
2897 files_struct **result)
2899 files_struct *fsp = NULL;
2900 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2901 struct share_mode_lock *lck = NULL;
2903 struct timespec mtimespec;
2906 if (is_ntfs_stream_smb_fname(smb_dname)) {
2907 DEBUG(2, ("open_directory: %s is a stream name!\n",
2908 smb_fname_str_dbg(smb_dname)));
2909 return NT_STATUS_NOT_A_DIRECTORY;
2912 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2913 /* Ensure we have a directory attribute. */
2914 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2917 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2918 "share_access = 0x%x create_options = 0x%x, "
2919 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2920 smb_fname_str_dbg(smb_dname),
2921 (unsigned int)access_mask,
2922 (unsigned int)share_access,
2923 (unsigned int)create_options,
2924 (unsigned int)create_disposition,
2925 (unsigned int)file_attributes));
2927 status = smbd_calculate_access_mask(conn, smb_dname,
2928 access_mask, &access_mask);
2929 if (!NT_STATUS_IS_OK(status)) {
2930 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2931 "on file %s returned %s\n",
2932 smb_fname_str_dbg(smb_dname),
2933 nt_errstr(status)));
2937 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2938 !security_token_has_privilege(get_current_nttok(conn),
2939 SEC_PRIV_SECURITY)) {
2940 DEBUG(10, ("open_directory: open on %s "
2941 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2942 smb_fname_str_dbg(smb_dname)));
2943 return NT_STATUS_PRIVILEGE_NOT_HELD;
2946 switch( create_disposition ) {
2950 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2953 info = FILE_WAS_OPENED;
2958 /* If directory exists error. If directory doesn't
2962 status = NT_STATUS_OBJECT_NAME_COLLISION;
2963 DEBUG(2, ("open_directory: unable to create "
2964 "%s. Error was %s\n",
2965 smb_fname_str_dbg(smb_dname),
2966 nt_errstr(status)));
2970 status = mkdir_internal(conn, smb_dname,
2973 if (!NT_STATUS_IS_OK(status)) {
2974 DEBUG(2, ("open_directory: unable to create "
2975 "%s. Error was %s\n",
2976 smb_fname_str_dbg(smb_dname),
2977 nt_errstr(status)));
2981 info = FILE_WAS_CREATED;
2986 * If directory exists open. If directory doesn't
2991 status = NT_STATUS_OK;
2992 info = FILE_WAS_OPENED;
2994 status = mkdir_internal(conn, smb_dname,
2997 if (NT_STATUS_IS_OK(status)) {
2998 info = FILE_WAS_CREATED;
3000 /* Cope with create race. */
3001 if (!NT_STATUS_EQUAL(status,
3002 NT_STATUS_OBJECT_NAME_COLLISION)) {
3003 DEBUG(2, ("open_directory: unable to create "
3004 "%s. Error was %s\n",
3005 smb_fname_str_dbg(smb_dname),
3006 nt_errstr(status)));
3009 info = FILE_WAS_OPENED;
3015 case FILE_SUPERSEDE:
3016 case FILE_OVERWRITE:
3017 case FILE_OVERWRITE_IF:
3019 DEBUG(5,("open_directory: invalid create_disposition "
3020 "0x%x for directory %s\n",
3021 (unsigned int)create_disposition,
3022 smb_fname_str_dbg(smb_dname)));
3023 return NT_STATUS_INVALID_PARAMETER;
3026 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
3027 DEBUG(5,("open_directory: %s is not a directory !\n",
3028 smb_fname_str_dbg(smb_dname)));
3029 return NT_STATUS_NOT_A_DIRECTORY;
3032 if (info == FILE_WAS_OPENED) {
3033 status = smbd_check_access_rights(conn,
3037 if (!NT_STATUS_IS_OK(status)) {
3038 DEBUG(10, ("open_directory: smbd_check_access_rights on "
3039 "file %s failed with %s\n",
3040 smb_fname_str_dbg(smb_dname),
3041 nt_errstr(status)));
3046 status = file_new(req, conn, &fsp);
3047 if(!NT_STATUS_IS_OK(status)) {
3052 * Setup the files_struct for it.
3055 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
3056 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
3057 fsp->file_pid = req ? req->smbpid : 0;
3058 fsp->can_lock = False;
3059 fsp->can_read = False;
3060 fsp->can_write = False;
3062 fsp->share_access = share_access;
3063 fsp->fh->private_options = 0;
3065 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3067 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3068 fsp->print_file = NULL;
3069 fsp->modified = False;
3070 fsp->oplock_type = NO_OPLOCK;
3071 fsp->sent_oplock_break = NO_BREAK_SENT;
3072 fsp->is_directory = True;
3073 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3074 status = fsp_set_smb_fname(fsp, smb_dname);
3075 if (!NT_STATUS_IS_OK(status)) {
3076 file_free(req, fsp);
3080 mtimespec = smb_dname->st.st_ex_mtime;
3083 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3085 /* POSIX allows us to open a directory with O_RDONLY. */
3086 status = fd_open(conn, fsp, O_RDONLY, 0);
3088 if (!NT_STATUS_IS_OK(status)) {
3089 DEBUG(5, ("open_directory: Could not open fd for "
3091 smb_fname_str_dbg(smb_dname),
3092 nt_errstr(status)));
3093 file_free(req, fsp);
3097 status = vfs_stat_fsp(fsp);
3098 if (!NT_STATUS_IS_OK(status)) {
3100 file_free(req, fsp);
3104 /* Ensure there was no race condition. */
3105 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3106 DEBUG(5,("open_directory: stat struct differs for "
3108 smb_fname_str_dbg(smb_dname)));
3110 file_free(req, fsp);
3111 return NT_STATUS_ACCESS_DENIED;
3114 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3115 conn->connectpath, smb_dname,
3119 DEBUG(0, ("open_directory: Could not get share mode lock for "
3120 "%s\n", smb_fname_str_dbg(smb_dname)));
3122 file_free(req, fsp);
3123 return NT_STATUS_SHARING_VIOLATION;
3126 status = open_mode_check(conn, lck, fsp->name_hash,
3127 access_mask, share_access,
3128 create_options, &dir_existed);
3130 if (!NT_STATUS_IS_OK(status)) {
3133 file_free(req, fsp);
3137 set_share_mode(lck, fsp, get_current_uid(conn),
3138 req ? req->mid : 0, NO_OPLOCK);
3140 /* For directories the delete on close bit at open time seems
3141 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3142 if (create_options & FILE_DELETE_ON_CLOSE) {
3143 status = can_set_delete_on_close(fsp, 0);
3144 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3147 file_free(req, fsp);
3151 if (NT_STATUS_IS_OK(status)) {
3152 /* Note that here we set the *inital* delete on close flag,
3153 not the regular one. The magic gets handled in close. */
3154 fsp->initial_delete_on_close = True;
3165 return NT_STATUS_OK;
3168 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3169 struct smb_filename *smb_dname)
3174 status = SMB_VFS_CREATE_FILE(
3177 0, /* root_dir_fid */
3178 smb_dname, /* fname */
3179 FILE_READ_ATTRIBUTES, /* access_mask */
3180 FILE_SHARE_NONE, /* share_access */
3181 FILE_CREATE, /* create_disposition*/
3182 FILE_DIRECTORY_FILE, /* create_options */
3183 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
3184 0, /* oplock_request */
3185 0, /* allocation_size */
3186 0, /* private_flags */
3192 if (NT_STATUS_IS_OK(status)) {
3193 close_file(req, fsp, NORMAL_CLOSE);
3199 /****************************************************************************
3200 Receive notification that one of our open files has been renamed by another
3202 ****************************************************************************/
3204 void msg_file_was_renamed(struct messaging_context *msg,
3207 struct server_id server_id,
3211 char *frm = (char *)data->data;
3213 const char *sharepath;
3214 const char *base_name;
3215 const char *stream_name;
3216 struct smb_filename *smb_fname = NULL;
3217 size_t sp_len, bn_len;
3219 struct smbd_server_connection *sconn =
3220 talloc_get_type_abort(private_data,
3221 struct smbd_server_connection);
3223 if (data->data == NULL
3224 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3225 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3226 (int)data->length));
3230 /* Unpack the message. */
3231 pull_file_id_24(frm, &id);
3232 sharepath = &frm[24];
3233 sp_len = strlen(sharepath);
3234 base_name = sharepath + sp_len + 1;
3235 bn_len = strlen(base_name);
3236 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3238 /* stream_name must always be NULL if there is no stream. */
3239 if (stream_name[0] == '\0') {
3243 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3244 stream_name, NULL, &smb_fname);
3245 if (!NT_STATUS_IS_OK(status)) {
3249 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3251 sharepath, smb_fname_str_dbg(smb_fname),
3252 file_id_string_tos(&id)));
3254 for(fsp = file_find_di_first(sconn, id); fsp;
3255 fsp = file_find_di_next(fsp)) {
3256 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3258 DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3259 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3260 smb_fname_str_dbg(smb_fname)));
3261 status = fsp_set_smb_fname(fsp, smb_fname);
3262 if (!NT_STATUS_IS_OK(status)) {
3267 /* Now we have the complete path we can work out if this is
3268 actually within this share and adjust newname accordingly. */
3269 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3270 "not sharepath %s) "
3271 "%s from %s -> %s\n",
3272 fsp->conn->connectpath,
3276 smb_fname_str_dbg(smb_fname)));
3280 TALLOC_FREE(smb_fname);
3285 * If a main file is opened for delete, all streams need to be checked for
3286 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3287 * If that works, delete them all by setting the delete on close and close.
3290 NTSTATUS open_streams_for_delete(connection_struct *conn,
3293 struct stream_struct *stream_info = NULL;
3294 files_struct **streams = NULL;
3296 unsigned int num_streams = 0;
3297 TALLOC_CTX *frame = talloc_stackframe();
3300 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3301 &num_streams, &stream_info);
3303 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3304 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3305 DEBUG(10, ("no streams around\n"));
3307 return NT_STATUS_OK;
3310 if (!NT_STATUS_IS_OK(status)) {
3311 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3312 nt_errstr(status)));
3316 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3319 if (num_streams == 0) {
3321 return NT_STATUS_OK;
3324 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3325 if (streams == NULL) {
3326 DEBUG(0, ("talloc failed\n"));
3327 status = NT_STATUS_NO_MEMORY;
3331 for (i=0; i<num_streams; i++) {
3332 struct smb_filename *smb_fname = NULL;
3334 if (strequal(stream_info[i].name, "::$DATA")) {
3339 status = create_synthetic_smb_fname(talloc_tos(), fname,
3340 stream_info[i].name,
3342 if (!NT_STATUS_IS_OK(status)) {
3346 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3347 DEBUG(10, ("Unable to stat stream: %s\n",
3348 smb_fname_str_dbg(smb_fname)));
3351 status = SMB_VFS_CREATE_FILE(
3354 0, /* root_dir_fid */
3355 smb_fname, /* fname */
3356 DELETE_ACCESS, /* access_mask */
3357 (FILE_SHARE_READ | /* share_access */
3358 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3359 FILE_OPEN, /* create_disposition*/
3360 0, /* create_options */
3361 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3362 0, /* oplock_request */
3363 0, /* allocation_size */
3364 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3367 &streams[i], /* result */
3370 if (!NT_STATUS_IS_OK(status)) {
3371 DEBUG(10, ("Could not open stream %s: %s\n",
3372 smb_fname_str_dbg(smb_fname),
3373 nt_errstr(status)));
3375 TALLOC_FREE(smb_fname);
3378 TALLOC_FREE(smb_fname);
3382 * don't touch the variable "status" beyond this point :-)
3385 for (i -= 1 ; i >= 0; i--) {
3386 if (streams[i] == NULL) {
3390 DEBUG(10, ("Closing stream # %d, %s\n", i,
3391 fsp_str_dbg(streams[i])));
3392 close_file(NULL, streams[i], NORMAL_CLOSE);
3400 /*********************************************************************
3401 Create a default ACL by inheriting from the parent. If no inheritance
3402 from the parent available, don't set anything. This will leave the actual
3403 permissions the new file or directory already got from the filesystem
3404 as the NT ACL when read.
3405 *********************************************************************/
3407 static NTSTATUS inherit_new_acl(files_struct *fsp)
3409 TALLOC_CTX *ctx = talloc_tos();
3410 char *parent_name = NULL;
3411 struct security_descriptor *parent_desc = NULL;
3412 NTSTATUS status = NT_STATUS_OK;
3413 struct security_descriptor *psd = NULL;
3414 struct dom_sid *owner_sid = NULL;
3415 struct dom_sid *group_sid = NULL;
3416 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3417 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3418 bool inheritable_components = false;
3421 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3422 return NT_STATUS_NO_MEMORY;
3425 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3427 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3429 if (!NT_STATUS_IS_OK(status)) {
3433 inheritable_components = sd_has_inheritable_components(parent_desc,
3436 if (!inheritable_components && !inherit_owner) {
3437 /* Nothing to inherit and not setting owner. */
3438 return NT_STATUS_OK;
3441 /* Create an inherited descriptor from the parent. */
3443 if (DEBUGLEVEL >= 10) {
3444 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3445 fsp_str_dbg(fsp) ));
3446 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3449 /* Inherit from parent descriptor if "inherit owner" set. */
3450 if (inherit_owner) {
3451 owner_sid = parent_desc->owner_sid;
3452 group_sid = parent_desc->group_sid;
3455 if (owner_sid == NULL) {
3456 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3458 if (group_sid == NULL) {
3459 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3462 status = se_create_child_secdesc(ctx,
3469 if (!NT_STATUS_IS_OK(status)) {
3473 /* If inheritable_components == false,
3474 se_create_child_secdesc()
3475 creates a security desriptor with a NULL dacl
3476 entry, but with SEC_DESC_DACL_PRESENT. We need
3477 to remove that flag. */
3479 if (!inheritable_components) {
3480 security_info_sent &= ~SECINFO_DACL;
3481 psd->type &= ~SEC_DESC_DACL_PRESENT;
3484 if (DEBUGLEVEL >= 10) {
3485 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3486 fsp_str_dbg(fsp) ));
3487 NDR_PRINT_DEBUG(security_descriptor, psd);
3490 if (inherit_owner) {
3491 /* We need to be root to force this. */
3494 status = SMB_VFS_FSET_NT_ACL(fsp,
3497 if (inherit_owner) {
3504 * Wrapper around open_file_ntcreate and open_directory
3507 static NTSTATUS create_file_unixpath(connection_struct *conn,
3508 struct smb_request *req,
3509 struct smb_filename *smb_fname,
3510 uint32_t access_mask,
3511 uint32_t share_access,
3512 uint32_t create_disposition,
3513 uint32_t create_options,
3514 uint32_t file_attributes,
3515 uint32_t oplock_request,
3516 uint64_t allocation_size,
3517 uint32_t private_flags,
3518 struct security_descriptor *sd,
3519 struct ea_list *ea_list,
3521 files_struct **result,
3524 int info = FILE_WAS_OPENED;
3525 files_struct *base_fsp = NULL;
3526 files_struct *fsp = NULL;
3529 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3530 "file_attributes = 0x%x, share_access = 0x%x, "
3531 "create_disposition = 0x%x create_options = 0x%x "
3532 "oplock_request = 0x%x private_flags = 0x%x "
3533 "ea_list = 0x%p, sd = 0x%p, "
3535 (unsigned int)access_mask,
3536 (unsigned int)file_attributes,
3537 (unsigned int)share_access,
3538 (unsigned int)create_disposition,
3539 (unsigned int)create_options,
3540 (unsigned int)oplock_request,
3541 (unsigned int)private_flags,
3542 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3544 if (create_options & FILE_OPEN_BY_FILE_ID) {
3545 status = NT_STATUS_NOT_SUPPORTED;
3549 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3550 status = NT_STATUS_INVALID_PARAMETER;
3555 oplock_request |= INTERNAL_OPEN_ONLY;
3558 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3559 && (access_mask & DELETE_ACCESS)
3560 && !is_ntfs_stream_smb_fname(smb_fname)) {
3562 * We can't open a file with DELETE access if any of the
3563 * streams is open without FILE_SHARE_DELETE
3565 status = open_streams_for_delete(conn, smb_fname->base_name);
3567 if (!NT_STATUS_IS_OK(status)) {
3572 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3573 !security_token_has_privilege(get_current_nttok(conn),
3574 SEC_PRIV_SECURITY)) {
3575 DEBUG(10, ("create_file_unixpath: open on %s "
3576 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3577 smb_fname_str_dbg(smb_fname)));
3578 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3582 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3583 && is_ntfs_stream_smb_fname(smb_fname)
3584 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3585 uint32 base_create_disposition;
3586 struct smb_filename *smb_fname_base = NULL;
3588 if (create_options & FILE_DIRECTORY_FILE) {
3589 status = NT_STATUS_NOT_A_DIRECTORY;
3593 switch (create_disposition) {
3595 base_create_disposition = FILE_OPEN;
3598 base_create_disposition = FILE_OPEN_IF;
3602 /* Create an smb_filename with stream_name == NULL. */
3603 status = create_synthetic_smb_fname(talloc_tos(),
3604 smb_fname->base_name,
3607 if (!NT_STATUS_IS_OK(status)) {
3611 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3612 DEBUG(10, ("Unable to stat stream: %s\n",
3613 smb_fname_str_dbg(smb_fname_base)));
3616 /* Open the base file. */
3617 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3620 | FILE_SHARE_DELETE,
3621 base_create_disposition,
3622 0, 0, 0, 0, 0, NULL, NULL,
3624 TALLOC_FREE(smb_fname_base);
3626 if (!NT_STATUS_IS_OK(status)) {
3627 DEBUG(10, ("create_file_unixpath for base %s failed: "
3628 "%s\n", smb_fname->base_name,
3629 nt_errstr(status)));
3632 /* we don't need to low level fd */
3637 * If it's a request for a directory open, deal with it separately.
3640 if (create_options & FILE_DIRECTORY_FILE) {
3642 if (create_options & FILE_NON_DIRECTORY_FILE) {
3643 status = NT_STATUS_INVALID_PARAMETER;
3647 /* Can't open a temp directory. IFS kit test. */
3648 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3649 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3650 status = NT_STATUS_INVALID_PARAMETER;
3655 * We will get a create directory here if the Win32
3656 * app specified a security descriptor in the
3657 * CreateDirectory() call.
3661 status = open_directory(
3662 conn, req, smb_fname, access_mask, share_access,
3663 create_disposition, create_options, file_attributes,
3668 * Ordinary file case.
3671 status = file_new(req, conn, &fsp);
3672 if(!NT_STATUS_IS_OK(status)) {
3676 status = fsp_set_smb_fname(fsp, smb_fname);
3677 if (!NT_STATUS_IS_OK(status)) {
3683 * We're opening the stream element of a
3684 * base_fsp we already opened. Set up the
3687 fsp->base_fsp = base_fsp;
3690 if (allocation_size) {
3691 fsp->initial_allocation_size = smb_roundup(fsp->conn,
3695 status = open_file_ntcreate(conn,
3707 if(!NT_STATUS_IS_OK(status)) {
3708 file_free(req, fsp);
3712 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3714 /* A stream open never opens a directory */
3717 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3722 * Fail the open if it was explicitly a non-directory
3726 if (create_options & FILE_NON_DIRECTORY_FILE) {
3727 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3732 status = open_directory(
3733 conn, req, smb_fname, access_mask,
3734 share_access, create_disposition,
3735 create_options, file_attributes,
3740 if (!NT_STATUS_IS_OK(status)) {
3744 fsp->base_fsp = base_fsp;
3746 if ((ea_list != NULL) &&
3747 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3748 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3749 if (!NT_STATUS_IS_OK(status)) {
3754 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3755 status = NT_STATUS_ACCESS_DENIED;
3759 /* Save the requested allocation size. */
3760 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3762 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3763 fsp->initial_allocation_size = smb_roundup(
3764 fsp->conn, allocation_size);
3765 if (fsp->is_directory) {
3766 /* Can't set allocation size on a directory. */
3767 status = NT_STATUS_ACCESS_DENIED;
3770 if (vfs_allocate_file_space(
3771 fsp, fsp->initial_allocation_size) == -1) {
3772 status = NT_STATUS_DISK_FULL;
3776 fsp->initial_allocation_size = smb_roundup(
3777 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3780 fsp->initial_allocation_size = 0;
3783 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3784 fsp->base_fsp == NULL) {
3787 * According to the MS documentation, the only time the security
3788 * descriptor is applied to the opened file is iff we *created* the
3789 * file; an existing file stays the same.
3791 * Also, it seems (from observation) that you can open the file with
3792 * any access mask but you can still write the sd. We need to override
3793 * the granted access before we call set_sd
3794 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3797 uint32_t sec_info_sent;
3798 uint32_t saved_access_mask = fsp->access_mask;
3800 sec_info_sent = get_sec_info(sd);
3802 fsp->access_mask = FILE_GENERIC_ALL;
3804 if (sec_info_sent & (SECINFO_OWNER|
3808 status = set_sd(fsp, sd, sec_info_sent);
3811 fsp->access_mask = saved_access_mask;
3813 if (!NT_STATUS_IS_OK(status)) {
3816 } else if (lp_inherit_acls(SNUM(conn))) {
3817 /* Inherit from parent. Errors here are not fatal. */
3818 status = inherit_new_acl(fsp);
3819 if (!NT_STATUS_IS_OK(status)) {
3820 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3822 nt_errstr(status) ));
3827 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3830 if (pinfo != NULL) {
3834 smb_fname->st = fsp->fsp_name->st;
3836 return NT_STATUS_OK;
3839 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3842 if (base_fsp && fsp->base_fsp == base_fsp) {
3844 * The close_file below will close
3849 close_file(req, fsp, ERROR_CLOSE);
3852 if (base_fsp != NULL) {
3853 close_file(req, base_fsp, ERROR_CLOSE);
3860 * Calculate the full path name given a relative fid.
3862 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3863 struct smb_request *req,
3864 uint16_t root_dir_fid,
3865 const struct smb_filename *smb_fname,
3866 struct smb_filename **smb_fname_out)
3868 files_struct *dir_fsp;
3869 char *parent_fname = NULL;
3870 char *new_base_name = NULL;
3873 if (root_dir_fid == 0 || !smb_fname) {
3874 status = NT_STATUS_INTERNAL_ERROR;
3878 dir_fsp = file_fsp(req, root_dir_fid);
3880 if (dir_fsp == NULL) {
3881 status = NT_STATUS_INVALID_HANDLE;
3885 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3886 status = NT_STATUS_INVALID_HANDLE;
3890 if (!dir_fsp->is_directory) {
3893 * Check to see if this is a mac fork of some kind.
3896 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3897 is_ntfs_stream_smb_fname(smb_fname)) {
3898 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3903 we need to handle the case when we get a
3904 relative open relative to a file and the
3905 pathname is blank - this is a reopen!
3906 (hint from demyn plantenberg)
3909 status = NT_STATUS_INVALID_HANDLE;
3913 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3915 * We're at the toplevel dir, the final file name
3916 * must not contain ./, as this is filtered out
3917 * normally by srvstr_get_path and unix_convert
3918 * explicitly rejects paths containing ./.
3920 parent_fname = talloc_strdup(talloc_tos(), "");
3921 if (parent_fname == NULL) {
3922 status = NT_STATUS_NO_MEMORY;
3926 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3929 * Copy in the base directory name.
3932 parent_fname = talloc_array(talloc_tos(), char,
3934 if (parent_fname == NULL) {
3935 status = NT_STATUS_NO_MEMORY;
3938 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3942 * Ensure it ends in a '/'.
3943 * We used TALLOC_SIZE +2 to add space for the '/'.
3947 && (parent_fname[dir_name_len-1] != '\\')
3948 && (parent_fname[dir_name_len-1] != '/')) {
3949 parent_fname[dir_name_len] = '/';
3950 parent_fname[dir_name_len+1] = '\0';
3954 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3955 smb_fname->base_name);
3956 if (new_base_name == NULL) {
3957 status = NT_STATUS_NO_MEMORY;
3961 status = filename_convert(req,
3963 req->flags2 & FLAGS2_DFS_PATHNAMES,
3968 if (!NT_STATUS_IS_OK(status)) {
3973 TALLOC_FREE(parent_fname);
3974 TALLOC_FREE(new_base_name);
3978 NTSTATUS create_file_default(connection_struct *conn,
3979 struct smb_request *req,
3980 uint16_t root_dir_fid,
3981 struct smb_filename *smb_fname,
3982 uint32_t access_mask,
3983 uint32_t share_access,
3984 uint32_t create_disposition,
3985 uint32_t create_options,
3986 uint32_t file_attributes,
3987 uint32_t oplock_request,
3988 uint64_t allocation_size,
3989 uint32_t private_flags,
3990 struct security_descriptor *sd,
3991 struct ea_list *ea_list,
3992 files_struct **result,
3995 int info = FILE_WAS_OPENED;
3996 files_struct *fsp = NULL;
3998 bool stream_name = false;
4000 DEBUG(10,("create_file: access_mask = 0x%x "
4001 "file_attributes = 0x%x, share_access = 0x%x, "
4002 "create_disposition = 0x%x create_options = 0x%x "
4003 "oplock_request = 0x%x "
4004 "private_flags = 0x%x "
4005 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
4007 (unsigned int)access_mask,
4008 (unsigned int)file_attributes,
4009 (unsigned int)share_access,
4010 (unsigned int)create_disposition,
4011 (unsigned int)create_options,
4012 (unsigned int)oplock_request,
4013 (unsigned int)private_flags,
4014 (unsigned int)root_dir_fid,
4015 ea_list, sd, smb_fname_str_dbg(smb_fname)));
4018 * Calculate the filename from the root_dir_if if necessary.
4021 if (root_dir_fid != 0) {
4022 struct smb_filename *smb_fname_out = NULL;
4023 status = get_relative_fid_filename(conn, req, root_dir_fid,
4024 smb_fname, &smb_fname_out);
4025 if (!NT_STATUS_IS_OK(status)) {
4028 smb_fname = smb_fname_out;
4032 * Check to see if this is a mac fork of some kind.
4035 stream_name = is_ntfs_stream_smb_fname(smb_fname);
4037 enum FAKE_FILE_TYPE fake_file_type;
4039 fake_file_type = is_fake_file(smb_fname);
4041 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
4044 * Here we go! support for changing the disk quotas
4047 * We need to fake up to open this MAGIC QUOTA file
4048 * and return a valid FID.
4050 * w2k close this file directly after openening xp
4051 * also tries a QUERY_FILE_INFO on the file and then
4054 status = open_fake_file(req, conn, req->vuid,
4055 fake_file_type, smb_fname,
4057 if (!NT_STATUS_IS_OK(status)) {
4061 ZERO_STRUCT(smb_fname->st);
4065 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
4066 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
4071 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
4073 smb_fname->stream_name = NULL;
4074 /* We have to handle this error here. */
4075 if (create_options & FILE_DIRECTORY_FILE) {
4076 status = NT_STATUS_NOT_A_DIRECTORY;
4079 if (lp_posix_pathnames()) {
4080 ret = SMB_VFS_LSTAT(conn, smb_fname);
4082 ret = SMB_VFS_STAT(conn, smb_fname);
4085 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
4086 status = NT_STATUS_FILE_IS_A_DIRECTORY;
4091 status = create_file_unixpath(
4092 conn, req, smb_fname, access_mask, share_access,
4093 create_disposition, create_options, file_attributes,
4094 oplock_request, allocation_size, private_flags,
4098 if (!NT_STATUS_IS_OK(status)) {
4103 DEBUG(10, ("create_file: info=%d\n", info));
4106 if (pinfo != NULL) {
4109 return NT_STATUS_OK;
4112 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
4115 close_file(req, fsp, ERROR_CLOSE);